The Ride Comfort And Handling Stability Simulation Of Electric Vehicles

With the development of society,the car has become the essential goods inmillions of family. However, the environmental pollution caused by the vehicleemission must be considered. With the short of non-renewable resources such asthe petrol, new energy vehicles have become the focus of the future developmentdirection of the automobile industry. The electric wheel vehicle is one of the mostpotential among the electric vehicles. The motors are integrated into the wheels,reducing much traditional mechanical structure and many other advantages. However,due to the involvement of the motor,the unsprung mass will becomes larger, this willaffect the vehicle’s ride comfort and handling stability.This paper focuses on the influence of electric wheel car unsprung mass changeon vehicle performance, combined with the structural characteristics of electricvehicles, use Matlab/Simulink software,build the ride comfort and handling stabilitymodel and do the simulation and analysis. The main contents are as follows:Firstly we introduced the structural characteristics of electric wheel vehicles, thevehicle will be simplified to11degrees of freedom vibration model, using Matlab/Simulink to build ride simulation models. Build the random excitation road of class B、C and triangle pulse road with Matlab/Simulink. Studying the ride comfort of vehiclein different road and speed.We study the ride comfort as the different quality of eachwheel. We can get the parameters such as vertical acceleration of each seats and thevehicle body,the suspension deflections and dynamic wheel load. We analyzaed thesimulation results and get the speed-acceleration curve in different quality ofunsprung mass.As the motor is integrated in the wheels, the torque ripple of the motor rotationwill affect the ride comfrt of the body passed through the vehicle suspensionsystem.This paper selects the switched reluctance motor,building the equation offluctuation in the vertical direction according to the ratating of motor.Studying theeffects of motor vibration on vehicle ride comfort. According to the simulation results, the vibration of motor may have a peak in the frequency the same as the wheelsystem and the body, the impact of the motor installation and matching of thesuspension is very important to solve the vibration of motor.Establishing seven degrees of freedom model of vehicle handling and stability aswell as motor and motor control model.And simulating in simple handling stabilityconditions. Combining the ride comfort and handling stability model into the electricwheel automobile model. Research on the impact of dynamic load on the vehiclewheel steering stability, acceleration change of seats in steering conditions. Themodel can be individually do ride comfort or handling stability simulation, can alsostudy handling stability in uneven road,on the establishment of electric wheelautomobile parametric platform,providing a reference for the development of newmodels.